Anchor



R. E. M INTOSH ET AL ANCHOR March 3, 1931.

VEN

Filed May 7, 1928 mu/WA mg m wm wo mm m a 2 4 Patented Mar. 3, 1931 UNITED STATES PATENT OFFICE ROY E. MGINTOSH, OF NEW YORK, N. 1.. AND ARTHUR It. VAN TASSELL, OF BAYONNE, NEWJEiR-SEY, ASSIGNORS, BY MESNE ASSIGNMIENTS, TO J. EDWARD OGDEN COM? PANY, OF NEW YORK, N. Y., A CORPORATION 01* NEW JERFSEY ANCHOR Application filed May 7, 192s.- Serial naeva yri.

This invention relates to anchors particularly adapted for anchoring screws 1n walls I of brick stone or cementitious material not adapted to directly receive and retain a screw or other element to be anchored.

, Ordinarily a particular size of anchor must be used for each size of screw and, therefore, a dealer must keep in stock a large number of sizes of anchors. Furthermore, different sizes. of anchors require different sizes of holes or bores and this necessitates carrying in stock many sizes of drills.

Many forms of screw anchors have been designed and most of such anchors are slotted longitudinally. When a screw is anchored in the ordinary screw anchor, there is a tendency for the screw to crowd sidewise into one of the slots. This renders the anchorage insecure and inefficient. 1

One of the objects of this invention is to provide a simple, practical and inexpensive anchor so constructed and arranged that it canbe used with a plurality of sizes of screws or other elements to be anchored.

Another object of the invention is to provide an anchor having one or more longitudinal slits therein and so constructed and arranged that any tendency of the expanding member, such as a screw, to crowd sidewise and enter the slit is counteracted.

Further objects of the invention will appear from the following specification taken in connection with the drawings, which form a part of this application, and in which Fig. 1 is an elevational View of an anchor constructed in accordance with the invention;

Figs. 2 and 3 are end views looking at the two ends of the anchor shown in Fig. 1;

Fig. 4 is a longitudinal section of the anchor shown in Fig. 1, this view being taken substantially on line 4 4c of Fig. 1;

Fig. 5 is a sectional elevation taken substantially on line 5-5 of Fig. 1; 1

Fig. 6 is a sectional elevation similar to Fig. 5 showing the anchor expanded by one size of screw;

Fig. 7 is a view similar to Fig. 6 showing the anchor expanded by a larger size of screw; and

Figs. 8, 9 and 10 are sectional elevations showing diflerent forms .of cross sections of anchors constructed in accordance with the invention. i 1

The invention briefly described consistsof an anchor formed of ductile metal and having one or more longitudinal slits therein.- The wall of the anchor at one edge of each slit is thickened. It has been found most advantageous to thicken the wall at the edge of the slit'located in advance in the direction of rotation of the expanding member or member to be anchored. Any tendency of the screw or other member to be anchored to crowd into one of the slits causes the material'in the thickened edge to flow with the rotating member and to close the slit. v

Further details of the invention will appear from the following description.

In the form of the invention illustratedin Figs. 1 to 7 inclusive, there is shown an anchor comprising a tubular member preferably formed of ductile metal, such as lead. The anchor has a flared outer end 10, a-substantially cylindrical portion 11, and a portion 12 having circumferential ridges 13 formed therein. Thetubular member is slit longitudinally throughout its I length, as shown at 15, and is provided with a longitudinal slit 16 which extends from the inner end of the anchor to the flared portionlO. The slit 15 permits the screw to enter the anchor easily without turning the anchor in the hole in which it is inserted.

From the showings in Figs. 2, 3, 4 and 5, it will be seen that the edge portions 20 and 21 of the wall of the tubular member at the slits 15 and 16 are thickened at 2'5 and 26.

The thickened portions 25 and 26 permit 7 The forms of the invention shown in Figs. 8, 9 and 10 embody the same principle as the form illustrated in Fig. 5, in that the wall of the tubular member is thickened at the edges of the slits in such a manner that the rotation of the screw or other member to be anchored will cause the metal to flow with the rotating member and close the slits. Thus,. although the slits are advantageous since they permit the screw to enter easily into the anchor, they are closed after the screw has been screwed in to such an extent that the metal adjacent the slits is caused to flow with the screw.

In the form of the invention illustrated in Fig. 8, the walls are thickened as shown at 30 and 31 adjacent the slits 15 and 16, the thickness being gradually increased from one side of the tubular member to the other.

In Fig. 9 the edge portions 33 and 34 are thickened.

In Fig. 10 extra metal 35 and 36 is provided on the outer surface of the two halves of the tubular member, thus thickening the walls adjacent the slits.

From the foregoing description it will be evident that all of the forms of anchors illustrated can be used with a plurality of sizes of screws or elements to be anchored and, furthermore, that any tendency of the screws to crowd sidewise into the slits will be counteracted by the flow of the metal from the thickened portions of the walls across the slits.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

What we claim is:

1. An anchor comprising a tubular member of ductile metal having longitudinal slits therein forming a plurality of expansible sections. the wall of the tubular member being thicker at one edge of each section than the remaining portion thereof, prior to the expansion of the anchor, thereby providing extra metal adapted to flow under the influence of a rotating expanding member to close said slits.

2. An anchor comprising a tubular member of ductile metal having a longitudinal slit therein, the wall at the advance edge of the slit, in the direction of rotation of the expanding member, being thicker than the remaining portion of the wall, prior to the expansion of the anchor, thereby providing extra metal adapted to close said slit.

3. An anchor comprising a tubular member of ductile met-a1 having a longitudinal slit therein extending throughout the length of the anchor, the Wall at the advance edge of the slit, in the direction of rotation of the expanding member, being thicker than the remaining portion of the Wall, thereby providing extra metal adapted to close said slit.

4. An anchor comprising a tubular member of ductile metal having longitudinal slits therein, the wall of the tubular member being thicker at the advance edge of each slit, in the direction of rotation of the expanding member than the remaining portions of the wall, prior to the expansion of the anchor, thereby providing extra metal adapted to flow under the influence of the rotating expanding member to close said slits.

5. An anchor comprising a tubular member of ductile metal having longitudinal slits therein, the wall of the tubular member at one edge of each slit being thicker than the remaining portions of the wall, prior to the expansion of the anchor, thereby providing extra metal adapted to flow under the influence of a rotating expanding member to close said slits.

6. An anchor comprising a tubular member of ductile metal having longitudinal slits therein forming a plurality of expansible sections, the inner surface of the wall at one edge of each section being disposed nearer the axis of the tubular member than the inner surface at the remaining portion of said section, prior to the expansion of the anchor, thereby providing extra metal adapted to flow under the influence of a rotating expanding member to close said slits.

7. An anchor comprising a tubular member of ductile metal having a longitudinal slit therein, the wall of the tubular member being thicker than the remaining portion of the wall, prior to the expansion of the anchor, thereby providing extra metal adapted to flow under the influence of a rotating expanding member to close said slit.

In witness whereof, I have hereunto set my hand this 26 day of April, 1928.

ROY E. MOINTOSH.

In Witness whereof, I have hereunto set my hand this 26 day of April, 1928.

ARTHUR R. VAN TASSELL. 

